Aorta is big artery which takes blood from the heart and gives it to all body. Pulmonary artery carries deoxygenated blood from the heart to the lungs while pulmonary vein carries oxygenated blood from the lungs to the heart. Mitral and tricuspid valves prevent the backward flow of blood in the heart. Superior and inferior vena cava is a big vein which collects deoxygenated blood from all body.
Transfer ribonucleic acid (tRNA) is a type of RNA molecule that helps decode a messenger RNA (mRNA) sequence into a protein. tRNAs function at specific sites in the ribosome during translation, which is a process that synthesizes a protein from an mRNA molecule.
Explanation: Because Polaris, The "North Star", Is located alost directly over the Earth's North Pole. FUN FACT: This star was also used by sailors to navigate when maps could not be used
